Choose the correct path taken by a pair of electrons as it travels down the electron-transport chain.A:NADH→complex I→CoQ→complex III→ Cyt c→complex IV→O2 B:FADH2→complex I→CoQ→complex III→ Cyt c→complex IV→O2 C:NADH→complex I→complex II→complex III→ Cyt c→complex IV→O2 D:FADH2→complex II→CoQ→complex III→ Cyt c→complex IV→O2 答案: NADH→complex I→CoQ→complex III→ Cyt c→complex IV→O2;FADH2→complex II→CoQ→complex III→ Cyt c→complex IV→O2